Foul-air remover



J. MCNULTY.

FouL A'IR REMovEH.

APPLICATION FILED AUG.31| 1921.

PatentedSept. 26, 1922im4 Rx ii JOHN ll/TCNULTY, OF GULFPORT, MISSISSIPPI.

FOUL-AFE, `RE1IOVER.

Application led August 31, 1921. Serial No. 497,205.

To all fwtom it may concern:

Be it known that l, JOHN MCNULTY, a citizen of the United States, residing at Gulfport, in the county ot Harrison and State ot Mississippi, have invented certain new and useful Improvements in Foul-Air Y Removers, oi" which the -tolowing is a specitication.

My invention relates to an apparatus designed for use in school rooms, assembly halls, and other such gathering places, for the purpose of maintaining an even heat and distribution of air throughoutthe room, and at the same time provide a positive means for drawing oli the foul air without causing any undue draft, or undue acceleration of the rate at which the foul air is carried out of the room.

The primary object of the invention is to provide adevice of this character which is simple, inexpensive, durable and efficient in operation, and which is readily applicable to any of the heating elements as now used in school rooms, assembly halls and public meeting places.

Another object of the invention is to provide a foul air remover as described in which means are provided for adjusting the rate at which the foul air is carried 01T, whereby the device may be adapted to ditlierent sizes orI stoves to provide a uniform rate of distribution in the ventilating system.

A; further object of the invention is to provide in a device of this character, means for drawing 0E foul air, so constructed and arranged that the medium through which the air is fed away from the room is acted upon by the heated air within the room and not by direct radiation from the stove or chimney flue, such as in use at the present time.

W'ith these and such other objects in view as will be apparent from the description, my invention resides in the novel construction, combination and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawing, in which Figure l is an elevation showing my invention in assembled position as applied to the heating stove of the type ordinarily employed in school rooms;

Figure 2, a. horizontal section taken on the line 2-2 of Figure l;

Figure 3 is a vertical section through the `a short distance. of the floor.

foul air duct with an additional pipe section interposed between the 'oul air duct and the elbow l0. v

Figure fr, a horizontal section on the line Vl-4 ot Figure 3.

My .'nvention comprises the combination with a heating stove, which may be yof any approved type, as indicated at l, in this instance, ot the circular form, of a casing 2, formed of sheet metal and Aadapted to surround the stove in concentric relation to provide an eectual screen entirely around the stove. The casing 2 may be constructed of a plurality of vertical sections secured to lupper and lower supporting-rings 3 and 4t,

respectively, to which the casing is attached Ain any suitable manner, and it is immaterial to the present invention as to thevspeciiic structural details of the casing proper other than it be of sutlicient dimensions to extend entirely around the stove to provide an unobstructed air passageway around the stove. T he casing is provided witha door 5 and the top of the casing is open and spaced above the top of the stove l as clearly indicated in Figure l.

Fresh air is admitted to the air space around the stove, this space being designated i as at 6, by means of a conduit 7, which, in this instance, comprises ordinary metal piping attached to the casing 2at the lower portion thereof, to permit the ready entry of the air below the bottom of the heating stove, the relative position of the parts being illustrated in F ignre l. The stove 1 is provided with the ordinary outlet pipe 8, which is eX- tended above the top of casing 2. It is obvious that with the construction described, fresh air will be drawn in at the bottom of the stove through pipe 7 into the casing 2, and will be heated in its circulation around the stove, passing out over the top of the casing and into the room. As a means of withdrawing the foul air which collects at the bottom of the room, due to thecirculation, I provide air chiots 9,-mounted on thel casing at diametrically opposite points and extending vertically thereon from a point spaced above the top of the casing to within These air ducts, as illustrated in Figure 4, comprise semi-cylindrical metal sections bolted or otherwise suitably secured to the walls of the easing, and. are adapted to receive at bows l() and pipe sections of different diameter which are adapted to extend on an angle approximating 30 with the horizontal plane into a central vertical pipe section ll et still larger diameter, which may be suitably connected to a flue extending through the roof for leading off the foul air, carried up through the air ducts 9 and elbows 10.

ln the preferred torni of my invention, l provide a drum l2 secured on the lower end of pipe ll below the junction of the elbows l0 therewith. Sui'tably secured to the drum l2 and extending therebeneath is a coneshaped member i3 having an open bottom and provided with circuniicrentiallyV disposed periorations l/l adjacent the top. Filll, drum l2 and men'ibcr 1,3 are disposed directly above the center ot the top oit the heating stove vl. and spaced there-above a sutlicient distance so that the heated air arising from within the casing will circulate about these various members and impart a portion or" heat thereto, which serves to set up a circulation within the aforesaid pipes and air chiots 9, thereby causing the foul air to be drawn from the bottom of the room and carried oil as described. inasmuch as it is my intention to construct these casings and various parts of uniform sizes it is desirable to make same adjustable to meet the conditions inherent in the use of various sizes of stoves, taking into account :tuel employed as well as many other details. Accordingly, the drum l2 and elbows l0 may be raised or lowered relative to the top of the casing by the addition oi' pipe sections, as required, or by taking out a suilicient number ot sections to provide for the proper spacing of these members above the top of the casing and stove.

lhen it is -tound that too great a heat is set up by the stove and carried to the walls of the casing, which would greatly accelerate the upward flow of the ii'oul air within the air ducts 9, due to Vthe tact that the rear walls of the ducts are termed by the casing, this undesirable condition may be overcome by insertion ot siacing members l5 within the air ducts, which, owing to their construction and arrangement, will provide a rear wall for the ducts, which are spaced away from the casing wall, and provide a vertical air passage 16 in each duct. r'Fhese spacing members l5 comprise channeled metal sections of approximately the same height as the duct, and adapted to be slid thereinto from the top, the elbows l0 having iirst been removed. rThe lower end of the section l5 is adapted to rest on a projection 17 which may be suitably termed on or otherwise attached te the casing and the upper end thereof is 'formed with an inwardly curved portion 18 having a portion thereof bent to form a bend i9 and vertical lip 20, the arrangement and disposition ot these ineens@ .elements being such vthat the bend l) will be aligned with the wall o'l' the casing 2 and spaced thereaboye to provide an outlet for the air passage le, the elbows l() being then supported by the bends 19 and guided by the lips 20.

lt is obvious that this principle of construction may be applied to square casings adapted for use connection with square heating stoves, and that the shape o'r the parts may be varied to suit conditions, and, while l have described and illustrated certain preferred forms ant1 details which enter into the construction and operation ot Jion, desire it to be expressly unrnat it is not my uncut-ion to limit yselif in any way t the speciiic details, but 'that any such may be used as will tall within the sco )e ot the invention as claimed.

claim: l f device oi' the character described, comprising a casing adapted to surround and enclose, in spaced relation, a heating elenient, met for supplying fresh air to the interior of said casing beneath the heating element, and means for conveying the `oul air, comprising a pipe disposed in spaced relation above said casing, conduits in connection with said pipe, said conduits being carried on the exterior sides or' the casing and extending t iereabove to form supports i'or said oul air pipe, the top oiu said casing being open to 'permit et the heated air in the interior of the said casing circulating about said foul air pipe, whereby a circulation or 'foul air is set up within said conduits and pipe.

2. ln a foul air remover, a casing adapted to surround a lieatng element in spaced relation therefrom, a 'fresh air inlet in said casing, the top of said casing being open to provide an outlet for air heated within the casing, foul air conduits carried by said casng, a portion o' said conduits being dis posed in the path of the heated air arising from the interior ot the casing whereby circulation will be caused within said conduits for the removal or foul air, and adjustable pipe sections in said conduits whereby the rate oi' said circulation may be decreased or accelerated as desired. y

3. 2i device oiz the character described, comprising a cylindrical metal casing, adapted to surround a heating element, a fresh air intake pipe connected at the bottom of said casing, the top of said casing being open to provide 'for the escape of heated air, semi-cylindrical pipe sections secured to the exterior oit said casing to iorm with said casing conduits extending entirely up the walls of the casing, the lower ends ot said conduits being open and disposed adjacent the bottom ot the casing, angled elbows carried by the upper ends of said sections, and spaced above the top of said casing, and a vertical pipe sect-ion connected with said elbows, the bottom of said vertical pipe section being disposed in the path of the heated air in the interior of the casing, whereby a circulation is caused within said conduits and pipe sections to draw the foul air into said conduits adjacent the bottom of the casing.

4. A device of the character described for use in connection with a heating element pro vided with a chimney pipe, comprising a casino open at the top and adapted to enclose said heating element at the sides and bottom in spaced relation, and provided with a fresh air inlet, a foul air conduit carried hy said casing externally thereof, a foul air flue pipe disposed in spaced relation above the top of the casing in spaced relation to and independently of the heating element chimney pipe, connection between said conduit and foul air flue pipe, said foul air flue pipe and connection being disposed in the path of heated fresh air arising from within the casing whereby the heated fresh air will heat said foul air flue pipe ,to cause a moderate circulation of foul air through said conduit, connection, and flue pipe.

5. In a foul air remover, a casing adapted to surround a heating element in spaced relation therefrom, a fresh air inlet in said casing, the top of said casing being open to provide an outlet for air heated within the casing, foul air conduits carried by said casing, a pipe disposed in spaced relation above said casing, elbows in connection with said conduits, and supporting` said pipe above the center of the casing, a portion of said pipe extending below the joint of said elbows, and a flared member secured to said lower portion of the pipe whereby heated air arising from the interior of the casing will be collected and brought in contact with the bottom of said pipe, said pipe being closed at the bottom and the adjacent portion of said flared member being provided with perforations to permit of the circulation of heated air therethrough.

ln testimony whereof I affix my signature.

JOHN MCNULTY. 

